Drive Housing Replacement - Graco ultra max 795 Instruction Manual

Drive Housing Replacement

CAUTION
Do not drop gear cluster (51) when removing drive
housing (67). Gear cluster may stay engaged in
motor front end bell or drive housing.
Do not lose thrust balls (90) or drop thrust balls
between gears. If thrust balls are caught between
gears and not removed, serious damage will occur to
drive housing. If thrust balls are not in place at each
end of gear cluster, bearings will wear prematurely.
1. Read General Repair Information on page 3.
2.
Relieve pressure; page 3.
3. Fig. 9. Remove front cover (49) and motor shield
(54). Unclip drain hose (85) from pump.
4. Remove four bearing housing screws (25) and
lockwashers (23).
5. Tap lower rear of bearing housing (22) with plastic
mallet to loosen from drive housing (67). Pull
bearing housing and connecting rod straight off
drive housing.
54
Torque to 175 in-lb (19 N
m)
1
2 Torque to 90–100 in-lb (10.2–11.3 N
m)
Liberally apply grease
3
Fig. 9
34 16 2
20
2
16
90
20
6. Remove two drive housing screws (26) and
lockwashers (20).
7. Remove two lower screws (16) and lockwashers
(20) and then two upper screws (16) and lock-
washers (20) from front of motor (73).
8. Tap drive housing (67) with plastic mallet to loosen
from front of motor (73); pull drive housing straight
off.
9. Apply approximately 4 oz of bearing grease to
gear cluster (51). Grease is supplied with drive
housing replacement kit. Be sure thrust balls (90)
are in place.
10. Place bronze-colored washer (67b) then silver-col-
ored washer (67a) on shaft protruding from big
gear in drive housing (67).
11. Align gears and push new drive housing straight
onto front of motor and locating pins.
12. Continue reassembling sprayer.
90
67a
3
51
67b
67
20
2 26
85
22
25, 23 1
49
36
308842
7699B
15